I have a dataset where values should be between 0.25 and 1.25 in order to makes sense. Values that are beyond this range are not useful, and the entire variable is likely not worth analyzing.
Therefore, I would like to drop the whole variable for any variable that has any observation that is outside this range.

Example data:
date var1001 var2001 var3001 ...
21937 0.9 0.8 0.7
21938 0.8 0.7 0.6
21939 0.6 1.4 0.9
21940 1.0 0.2 1.0
In this example I would like to totally drop the entire variable var2001 - and I would like to do this in an automated way, as I have 1500 variables, and ~900 observations per variable.
I really can't figure out how to do it, neither in long or wide formats.

Really grateful for any help.